Close as you will come to getting an OEM fuel sender..

[RedFish]

The full tank resistance is closer to 74 Ohms. So 80 isn't awful.
Maybe it also matches the later fuel gages @RedFish mentions in this post: Gauge Cluster Issues/IVR

@toolmanmike This shows the internals and more
Thermal-Electric Gauges (Session 227) from the Master Technician's Service Conference

Per Stewart Warner specs, these are 80-10 instruments. 80 ohms = no needle movement. In the case of fuel gauge, 73 ohms will lift the needle to the first/empty hash mark. The tester used by service techs had less than 80 ohms for starting point because 80 or greater ohms would not have been a test. 80 or greater leaves you scratching your head, "Does it work or not?" I hope that makes sense.
Half range is 23 ohms. Calculator says half way between 80 and 10 is 45 but that's not how a thermal resistor instrument works. As a thermal resistor wire heats up its per inch resistance changes. Max range is 10 ohms.

 

[Dana67Dart]

Don't mean to hijack the thread, just some info that seemed relavant.

A couple of years ago I found a NOS Mopar sender for my Dart. It was a Mopar made (contracted) sender part number 4051 003 (build date? 0997?) (from my previous thread i have the part number as 045041004? Typo maybe?)

When I installed it I tweeked the up stop as I came to find out, too much, as it would peg the needle when the tank was full.

So today I decided to pull it and make an adjustment.

Well for craps sake... the float has some fuel in it.

No one has one in stock so I have to wait till tomorrow and hope the only one I could get is close enough to the right diameter.

This is full on the sender now

Also this is the best I can do to get it to read empty

I'm really hoping that the A 100 sender in this post proves to be a better sender for us all.

This is with a 10.1 ohm (100W) resister in place of sender

18.3 is 3/4

25.5 Is 1/2 (ran out of photo up loads)

47.2 is 1/4

This is with 80.5 ohms in place of the sender

This is with 83.5 ohms in place of sender

85.5 ohms from driver's perspective is dead nuts on empty

I added my resister values to my previous Threads graph (red triangles are Empty, 1/4, 1/2 and full on the gauge) I wish I had a 67 sender to compare

 

[Mike69cuda]

Very nice work!

 

[RedFish]

As far as I know,OEM senders never had a plastic float.

 

[Dana67Dart]

As far as I know,OEM senders never had a plastic float

This is an OEM sender, came in Mopar packaging, but made in the 98. I bought it from a Dodge dealer in Georgia (IIRC), I was told it was the last one in the Mopar parts system. I have a post about it and the part numbers that it supercedes.